LITTLE ROCK, Ark. (AP) - The attorney general's office on Friday asked a judge to dismiss a lawsuit from six death row inmates who want the court to order the Arkansas Department of Correction to turn over documents about lethal injection drugs.

Assistant Attorney General David Curran argued that the documents the inmates are seeking are exempt from the Freedom of Information Act.

Plus, Curran said, the inmates will almost certainly file another lawsuit, regardless of whether they get the documents they want.

Arkansas hasn't executed a death row inmate since 2005 in part because of legal challenges.

The state Supreme Court last year deemed Arkansas' 2009 lethal injection law unconstitutional, saying the Legislature had given the Department of Correction "unfettered discretion" to figure out the protocol and procedures for executions, including the chemicals to be used.

The Legislature this year enacted a new lethal injection law that spells out in greater detail the procedures that must be followed. The new law says the state must use a lethal dose of a barbiturate, but leaves it up to the Department of Correction to determine which drug. Correction officials say they haven't figured out which drug to use yet.

Arkansas doesn't have any pending executions, but Attorney General Dustin McDaniel's office recently took a step toward changing that. His office asked the Supreme Court to lift stays of execution for six of the state's 37 death row inmates: Don Davis, Stacey Johnson, Jack Jones, Jason McGehee, Bruce Ward and Marcel Williams.

Of those inmates, only Davis is not involved in the FOIA case. Kenneth Williams, another death row inmate, is the sixth person involved in that case.

In the FOIA case, the inmates' attorney, Jeff Rosenzweig, has argued that the prisoners have long been concerned about the correction department's "ability and willingness to carry out a humane and constitutional execution." The inmates are seeking documents containing information about the origin, history and quality of lethal injection drugs.

"Those concerns were heightened when, in 2011, the prisoners discovered that the ADC intended to execute them using unregulated, non-FDA-approved chemicals that it obtained from a business operating out of the back of an overseas driving school," Rosenzweig wrote in a court filing.

That year, Arkansas turned its supply of sodium thiopental over to federal officials amid questions about how it obtained it. Sodium thiopental, a sedative used in some lethal injections, has been hard to come by since its sole U.S. manufacturer stopped making it, so Arkansas and at least a half dozen other death-penalty states turned to overseas suppliers.

Rosenzweig said a fellow attorney, Josh Lee, asked correction spokeswoman Shea Wilson for records related to lethal injection drugs earlier this month. But according to Rosenzweig's lawsuit, Wilson said the department didn't have any new information to release under the state's new lethal injection law.

Curran, who represents the correction department and Wilson, said Wilson should be dismissed from the lawsuit. He says she's not a custodian of records that would fall within the scope of the inmates' FOIA request.